<template>
  <div class="main">
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getGoodsList"
          >
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
            <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- table表格区域 -->
      <el-table :data="goodslist" border stripe>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="商品名称" prop="goods_name"></el-table-column>
          <el-table-column label="商品价格(元)" prop="goods_price"
          width="95px"></el-table-column>
          <el-table-column label="商品重量" prop="goods_weight"
          width="70px"></el-table-column>
          <el-table-column label="创建时间" prop="add_time"
          width="140px">
          <template slot-scope="scope">
              {{scope.row.add_time | dateFormate}}
              </template>
              </el-table-column>
          <el-table-column label="操作" width="180px">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini"
                @click="showEditDialog(scope.row.goods_id)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini"
                @click="removeById(scope.row.goods_id)">删除</el-button>
              </template>
          </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[5, 10, 15, 20]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total" background>
    </el-pagination>
    </el-card>
    <!-- 展示编辑商品的对话框 -->
    <el-dialog
      title="修改商品"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item label="商品名称">
          <el-input v-model="editForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price" type="number">
          <el-input v-model="editForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="editForm.goods_weight"></el-input>
        </el-form-item>
        <el-form-item label="商品库存" prop="goods_number" type="number">
          <el-input v-model="editForm.goods_number"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editGoodsInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      //   商品列表
      goodslist: [],
      //   总数据条数
      total: 0,
      // 控制修改商品对话框的显示与隐藏
      editDialogVisible: false,
      // 查询的商品信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品库存', trigger: 'blur' },
        ]       
        }
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    //   根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败！')
      }
      this.$message.success('获取商品列表成功！')
      console.log(res.data)
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
        this.queryInfo.pagesize = newSize
        this.getGoodsList()
    },
    handleCurrentChange(newPage) {
        this.queryInfo.pagenum = newPage
        this.getGoodsList()
    },
    // 根据Id删除对应的商品
    async removeById(id) {
        // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if(confirmResult !== 'confirm') {
            return this.$message.info('已取消删除！')
        }
        const { data: res } = await this.$http.delete(`goods/${id}`)
        if(res.meta.status !== 200){
            return this.$message.error('删除商品失败！')
        }
        this.$message.success('删除商品成功！')
        this.getGoodsList()
    },
    // 展示编辑商品的对话框
    async showEditDialog(goods_id) {
        console.log(goods_id)
        const { data: res } = await this.$http.get('goods/' + goods_id)
        if (res.meta.status !== 200) {
        return this.$message.error('查询分类信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改商品对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改分类信息并提交
    editGoodsInfo() {
      // 预验证
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        // 发起修改商品信息的数据请求
        const { data: res } = await this.$http.put(
          'goods/' + this.editForm.goods_id,
          {
            goods_name: this.editForm.goods_name,
            goods_price: this.editForm.goods_price,
            goods_weight: this.editForm.goods_weight,
            goods_number: this.editForm.goods_number,
            goods_cat: this.editForm.goods_cat
          }
        )
        if (res.meta.status !== 200) {
          console.log(res)
          return this.$message.error('更新商品信息失败！')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getGoodsList()
        // 提示修改成功
        this.$message.success('更新分类信息成功！')
      })
    },
    goAddpage() {   
        this.$router.push('/goods/add')
    }
    }
  }
</script>

<style lang="less" scoped>
.main {
  display: block;
}
</style>
